Diamond tool



Jan. 8, 1952 SMALL 2,581,609

DIAMOND TOOL Filed Aug. 30, 1950 INVENTOR. LOUIS SMALL 49 TI'ORNE Patented Jan. 8, 1952 marrow) root.

Louis Small, Detroit, Mich... assinior to, Service Diamond Tool Company:1 Ferndele. Mi h a.

corpora ion. oi Michiz n Application August. 30, 1950, Serial No. 182,353

The present invention relates to a diamond tool and particularly to such tools used for dressing or truing grinding wheels or abrasive materials.

Such tools are used in wheel truing devices and natures of various types and are. designed to. hold a diamond. or a. plurality of diamonds in surface contact. with a grinding surface of an abrasive wheel, either to develop. a. desired contour therein or to restore. a desired contour thereto.

Since. such abrasive. wheels are. used to a great extent in high precision work, it is important that the dressing or truing operation be accurate, ly performed. This. requires that the diamond tool be held in a suiable holdingfixture and be moved into'an adjusted position with the diae monds therein in a predetermined position rela, tiveto the abrasive wheel surface to be dressed.

In many of the tools. used for this. purpose,

a diamond or plurality of diamonds held in a J an uneconomic. operation, not only because of the. ime. lost in changing. the tool, but al o in the. loss of materials which are expensive.

The present. invention isv more particularly concerned; with improving; the diamond tool con.- struction such as is. disclosed in. prior United States Patent No. 2,353,236, issued to. Donald R. Hamill and myself as. joint. inventors, which includes an adjustable and removable, diamond set member having a plurality of diamondstudded rinding surfaces. With this constructi he d amond set member is rotatably sun Ported on. a. clampingmember which is; secured or-f rm di eeral wi h a. shank. and which. upon loosen ng of. a. set screw in the clampin mem en s rota able to any of its adjusted positions. In h pri r tool. he diamond set mem her is. held against rotation solely by frictional enga em nt w th. the sides ofthe clamp and the is not provided, with any means to easily, wei ht and. a curately locate the diamond studde surface. relative. to the. axis of the. shank of the tool.

It is, therefore, an object of the present in vention. to provide a diamond tool for dressing or truing an abrasive wheel and which is. or a. novel design and construction to. provide a. plu rality of diamond set dressing faces in a single tool-molding shank, the tool being readily adrjusted and dressing faces being accurately located while in, a wheel dressing or truing fixture; to bring into surface contact with the abrasive wheel any desired diamond set face.

It is a further object. of the present. invention, to provide a diamond tool for dressingor truing an abrasive wheel and inwhich the. several diamond" set faces are. formed as apartv of an ad, justably movable member, the movable: member being mechanically and rigidly held in. the tool shank without brazing.

It is a further object of the present. invention to provide a diamond tool for dressing or truing an abrasive Wheel, and in which the diamond se movable member may be removed from or re. placed in the. tool while the shank is held in its adjusted position and location in the wheel dress-. ing or truing fixture. This allows. the use of various types of diamond set members in the same tool. thus giving the. tool a widerapplica tion in commercial use than is the case. with conventional tools in which the diamond set matrix is brazed into the shank.

It: is. a further object. of the present. invention to provide a diamond tool for dressing or train: anv abrasive. wheel and in which the novel design and construction permits. eillcient and economical manufacture or the tool by production methods, with the maximum utilization of the. materials employed.

Other objects of this invention will appear in the. following description and appended claims, reference being bad to. the accompanying drawn ins forming a part: of this specification wherein like reierence. characters designate correspond ins parts in the several views.

In the. drawin s:

Fig. l is a perspective view of a tool embodying the features of the present invention.

Fig. 2 is a front elevation of the tool shown in Fig. 1.

Fig- 3. is a sectional view of the tool taken sub-- stantially on the line 3+4 of Fig. 2.

Figs. 4 and 5 are front and side elevations. respectively. of a modification of the tool embodying the features 01 the present invention.

Before explaining in detail the present inven tion, it is to be understood that the invention is, not limited in its application to the details of construction and arrangement of parts illus-. trated in the accompanying drawing, sincethe invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitatiom Referring to the drawings, the diamond tool It illustrated therein is provided with a tool-holding shank 20 vwhichis adapted to be received in a tool-holdingji'g or fixture (not shown) and which has a clamp 2| for holding and locating a diamond set member 40. The clamp 2| has a body portion provided with an accurately finished locating surface 22 and an upwardly extending clamp arm 23 which is drilled and tapped, as at 24, to receive a suitable screw-threaded clamping member, such for example as an Allen set screw 25.

the locating surface portion of the clamp. With this construction, one of the finished faces of the diamond set member is held flush with the locating surface in any of its adjusted positions to accurately locate the opposite diamond-studded face relative to the shank of the tool when the screw is tightened into the clamp arm.

In employing asymmetrically-shaped diamond "setmember 40, such as -a hexagon-shaped member, wherein the diamond-studded faces are in parallelism with the corresponding finished faces, the angle of the locating surface relative to the The Screw 5 passes through an enlarged opening 4! in the diamond set member 40 and is provided with a fiat head 26 having a frusto-conical shoulder 21 which is adapted to engage around the edge of the opening 4| in the diamond set member, when the screw is threaded into the clamp arm 23, to accurately locate the diamond set member relative to the axis of the screw.

. As. shown in the drawings, the locating surface portion preferably extends in one direction at an angle to the axis of the shank and extends normal thereto ina transverse direction. This angle is determined by the angle at which it is desired to present the diamonds to the grinding wheel to be dressed and also by the particular geometric design selected for the diamond set member. The locating surface also extends in a plane parallel to and spaced from the axis of the screw 25. The diamond set member 40' is preferably formed of a metallic material such as'a metal matrix and has a plurality of sides 43, 44 and 45 provided with diam'ondslfi embedded in' the surface thereof. The diamond set member may be rotated or otherwise adjusted when removed from the clamp 2! to selectively bring into surface contact with an abrasive wheel or the like, any of the plurality of diamond-studded faces 43,44 and 45.

The diamond set member 46 is also provided with an individual fiat finished side or surface 43a, 44a, and 45a for each of the diamond-studded faces which is accurately finished and located relative to its respective diamond-studded face and relative to the plane of the diamonds '46 therein. The diamond-studded and finished faces may be parallel to each other or positioned at some definite predetermined angle R (Fig. 4) relative to each other, depending on the particular position of the locating surface 22 onthe clamp, and the angle at which it is desired'to present the diamond face to the abrasive wheel. However, the surfaceis so finished that,-in 'as' sembly with the clamp 2|, it is automatically located and positioned relative to the axis of the shank upon tightening of'the set screw into the clamp arm 23. T

As shown particularly in Figs. 1 and 2,\the diamond set member has a hexagon-shape in which the three alternate 'sides' are each provided with three diamonds. The sides may be selectively moved into operative position upon removal of the diamond set member 40 from the clamp 21, such that a fresh set of diamonds lfi are available for use on the grinding wheel when the diamonds of one of the other faces have become worn. The opposite faces of the diamond set member-are finishedto permit engagementof: the: same with axis of the shank 20 determines the angle at A' modification of the diamond set member is .shown in-Figs. 4 and 5, which has a non-symmetrical shape and which is adapted to be used with a clamp 60 having a locating surface 6| disposed normal to the axis of the shank 62. In this modificatiomthe alternate faces 53, 5'4 and of the diamond set member are each provided with three diamondsw lfiand the opposite sides 53a, 54a and 55a of the diamond set member-are finished to provide a definite and constant angle R with thecorresponding diamond-studded faces. In this modification, the angle R .of the diamond set member is the angle at which the diamonds are presented to the-grindingwheel.

While the various shapes of the diamond set members have been described and shown having equal angles or'alternately equal angles, it should be apparent that any configuration for the diamond set member is suitable'provided'that. all of the angles formed by each diamond-studded face with its corresponding finished face are" equal and provided that the finished faces are "tangent to a' circle having a'radius 1' equal to the' di'stance from the locating surface to the axis of the threaded'opening '(Fig. 2). 1 i Upon removal from the clamp 21 or ',thedia'- mond set member may be turned in any desired position to. bring anyone of the diamond-set faces into contact .with' the surface of an abrasive grinding wheel. Byvirtueof the locating surface 22 or 1B! and the finished surfaces on :the diamond set member, the tool is immediately ad'- justed to the desired angle to automatically pro vide the accurate and close adjustment'which'i's required for truing an abrasive wheel within the normally desired precision." 'Alsofit will be observed that the tool may beheld in the jig 'or fixture and the entire diamondset member re placed by a diamond set member of a'difierent design or with different diamond settings so that the single 'tool shank and clamping member may, if desired, be used with a plurality of differ en'ttypes of diamond-holding, surface-contacting members. 1 c I .From the foregoing, it will be seen that the tool of the present invention is of anovel design a'iid construction, and provides a plurality of diamond set dressing faces ina single tool-holding shank", the construction of the tool being such-that "it'is readily adjusted and accurately located while the shank is-in a wheel dressing or truing fixture to selectively bring into surface contact with 'the abrasive wheel any desired diamond 'set' face. The tool also is such that thediamond set faces are formed as-part of an adjustable movable member, which is rigidly held methamcany in the tool shank both by thesetscrew and also by engagement with the locating surfaceportion of theclamp. I

The diamond set movable member maybe re:

5 moved from and replaced in the tool'while the shank is held in its adjusted position and location in the wheel dressing or truing fixture. This allows the use of various types of diamond set members in the same tool, thus giving the tool a Wider application in commercial use than is the case with conventional tools in which the diamond set matrix is brazed in the shank. The tool is of novel design and construction and is such as to permit efficient and economical manufacture by mass production methods, providing for the maximum utilization of all of the materials employed.

Having thus described my invention, I claim:

1. A tool for dressing an abrasive grinding wheel and comprising a shank, a clamp at one end thereof comprising a fixed clamping arm, an adjustable screw threaded into said fixed clamping arm, and a locating surface portion disposed in a plane parallel to and spaced from the axis of said screw, and a multi-sided diamond set member having a plurality of diamondstudded sides and also a plurality of sides providing an individual finished surface for locating and positioning each of said diamond-studded sides relative to the axis of said shank, said diamond set member being secured relative to said shank in any of its adjusted positions by said screw and held with one of said finished surfaces in intimate engagement with said loeating surface portion.

2. A tool for dressing an abrasive grinding wheel as claimed in claim 1 and being further characterized in that said diamond set member is provided with an opening for freely receiving .i'

tain the finished surface thereof in intimate contact with said locating surface portion.

3. A tool for dressing an abrasive grinding wheel and comprising a shank; a clamp on one end thereof comprising a fixed clamping arm, an adjustable screw threaded into said. fixed clamping arm and a locating surface portion extending parallel to and spaced from the axis of said screw; and a diamond set member having a central opening therein freely receiving said screw and selectively secured relative to said shank by said screw, said screw having a conical shoulder portion partially extending into said opening and engaging said diamond set member to locate the same relative to said locating surface portion and to maintain the finished sur- 5 face thereof in intimate contact with said 10- eating surface portion to prevent rotation thereof, said diamond set member having a plurality of diamond-studded sides and a finished surface for each of said diamond-studded sides for locating and positioning each of said diamond-studded sides relative to the axis of said shank,

4. A tool for dressing an abrasive grinding wheel and comprising a, shank, a clamp at one end of said shank having a locating surface portion, and a diamond set member comprising a multi-sided body portion, alternate sides of which provide diamonds mounted for selective surface contact with the abrasive wheel, the remaining sides providing an individual flat finished surface for locating and positioning each of said sides having diamonds mounted therein relative to the axis of said shank, said clamp also including means securing said diamond set member to said shank and maintaining one of the finished surfaces of said diamond set member in intimate contact with said locating surface portion to prevent rotation thereof.

5. A tool for dressing an abrasive grinding wheel in accordance with claim 4 and being further characterized in that said multi-sided body portion is provided with an even number of sides and in that the individual finished surface for each side having diamonds therein. is disposed diametrically opposite thereto.

6. A tool for dressing an abrasive grinding wheel and comprising a shank, a clamp on one end thereof comprising a fixed clamping arm, an adjustable screw threaded into said fixed clamping arm and a locating surface portion extending parallel to and spaced from the axis of said screw, and a multi-sided diamond set member having a central opening therein freely receiving said screw and selectively secured relative to said shank by said screw, said screw having a conical shoulder portion partially extending into said opening and engaging said diamond set member to locate the same relative to said locating surface portion and to maintain the finished surface thereof in intimate contact with said locating surface portions to prevent rotation thereof, said diamond set member having a plurality of diamond-studded sides and a finished surface for each of said diamondstudded sides and diametrically opposite the same for locating and positioning each of said diamond-studded sides relative to the axis of said shank.

LOUIS SMALL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,459,805 Tasker June 26, 1923 2,353,236 Hammill July 11, 1944 2,368,696 Williams Feb. 6, 1945 2,380,451 Koebel July 31, 1945 FOREIGN PATENTS Number Country Date 75,337 Germany May 24, 1894 136,797 Great Britain Sept. 16, 1920 

